Efficient methane-generating pit using poultry excrement and methane generation process

Abstract

The invention relates to a methane-generating pit using poultry excrement, which is integrally horizontally placed under the water plane. Partition walls are arranged in the middle of the methane-generating pit for dividing the whole methane-generating pit into a plurality of unit methane-generating pits, and medium channels arranged on the partition walls are communicated with each other. An annular fermentation tank is arranged above the periphery of the methane-generating pit, a plurality of superconductive heat pipes are arranged on the inner side of the annular fermentation tank, and the superconductive heat pipes are inserted into the methane-generating pit. A material inlet and a material outlet are respectively arranged at two ends of the methane-generating pit and under the unit methane-generating pits at two ends of the methane-generating pit, a methane collector is arranged above each unit methane-generating pit, and the methane collectors are directly communicated with a gas storage tank through pipelines. The methane-generating pit has the advantages of being high in material concentration, integrating material inlet, deslagging, methane generating, stirring, temperature controlling, regulating and the like, being high in mechanization degree, large in treating quantity, fast in digesting rate and the like and can meet requirements for scale production, and concentration of inlet materials of a continuous methane-generating pit can reach about 15%.

Description

technical field [0001] The invention relates to biogas production technology, in particular to a biogas production process using livestock and poultry manure and a high-efficiency biogas pit using the process. Background technique [0002] Biogas technology is one of the most important technologies of biological cycle, and the use of this technology can transform rural livestock and poultry manure and crop residues in situ. The result of the application of this technology is that on the one hand, waste is disposed of, and at the same time, it can be converted into clean energy and organic fertilizers, providing the best technical support for resource reuse and sustainable social development. According to the national organic waste output of 700 million tons (calculated as dry material), 210 billion M of biogas can be produced 3 , and can produce 500 million tons of organic fertilizer at the same time, which provides the best technical measures for the lowest cost and highes...

AI Technical Summary

Problems solved by technology

[0005] 1. The traditional biogas digester technology adopts a low-concentration fermentation process, with low solid content, and the material concentration is generally only about 6%, so the production efficiency is low; there are structural defects, incomplete digestion, and low gas production efficiency

[0006] 2. The energy consumption of wet fermentation is high; the energy consumption in summer is more than 30% of the energy generated by itself, and the energy consumption in winter is more than 50% of the energy generated by itself, which greatly limits the normal production and energy utilization of biogas in winter in the north

[0007] 3. The current wet biogas digester is still the prototype of the small biogas in the past. The pond body is vertical and circular, with poor feed and slag discharge procedures, low digestibility, and difficulties in heat preservation, sand removal and top capping. can solve

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